135631147 has 4 divisors (see below), whose sum is σ = 137930040. Its totient is φ = 133332256.

The previous prime is 135631141. The next prime is 135631163. The reversal of 135631147 is 741136531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135631147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135631141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149358 + ... + 1149475.

It is an arithmetic number, because the mean of its divisors is an integer number (34482510).

Almost surely, 2^135631147 is an apocalyptic number.

135631147 is a deficient number, since it is larger than the sum of its proper divisors (2298893).

135631147 is an equidigital number, since it uses as much as digits as its factorization.

135631147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298892.

The product of its digits is 7560, while the sum is 31.

The square root of 135631147 is about 11646.0786104165. The cubic root of 135631147 is about 513.7909830102.

Adding to 135631147 its reverse (741136531), we get a palindrome (876767678).

The spelling of 135631147 in words is "one hundred thirty-five million, six hundred thirty-one thousand, one hundred forty-seven".